Borussia Dortmund goalkeeper Mitchell Langerak has apologised to former team-mate Robert Lewandowski after their goal-mouth collision left the Bayern Munich striker with a fractured cheekbone, nose and concussion. Ex-Dortmund forward Lewandowski, who has scored 23 goals in his first season with Bayern, spent Tuesday night in a Munich hospital following the collision with Langerak in extra time during Dortmund’s German Cup semi-final win. “Robert and I are friends and of course I am sorry for what happened,” said Langerak. “I hope he can play as soon as possible. Anyone who knows me knows it wasn’t intentional and that I wanted to clear the ball.”